ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 455 



Kniep, H. — Ueber das spezifische Gewicht von Fucus vesiculosus. (On the specific 

 gravity of F. vesiculosus.) Ber. Deutsch. Bot. GeselL, xxv. (1907) pp. 86-98. 



Mazza, a. — Saggio di Algologia Oceanica. (Essay on oceanic algology.) 



[A continuation of the notes on species of Floridese, already noticed in this 

 Journal.] Ntiov. Not., xviii. (1907) pp. 65-98. 



Olive, E. W. — Notes on the Occurrence of Oscillatoria prolifica Gomont in the 

 Ice of Pine Lake, Waukesia County, "Wise. 



Trans. Wisconsin Acad. Sci. Arts, Lett., xv. (1906) pp. 124-34. 



To BLEB, F. — Zur Morphologic und Entwicklung von Verwachsungen im Algen- 

 thallns. (On the morphology and development of deformations in the thallus 

 of algne.) Flora, xcvii. (1907) pp. 299-307 



ToRKA, V. — Algen der Ordnung Conjugatae aus der TJmgebung von Schwiebus. 



(Algie of the Order Conjugate from the surroundings of Schwiebus.) 



[The species enumerated in this list are described in detail from fresh 

 material, and include new forms of Closterium obtjisum Br6b. and 

 Micrasterias denticulata Br6b.] Helios, xxiii. (1906) pp. 91-104. 



Witt, A. — Beitrage zur Kenntniss von Chara ceratophylla Wallr. und Ch. crinita 

 Wallr. mit Taf. u. Fig. (Contributions to a knowledge of C. ceratophylla and 

 C. crinita, with tables and figures.) Zurich, 8vo, 1906, 47 pp. 



Fungi. 

 (By A. LoRRAiN Smith, F.L.S.) 



Studies in North American Peronosporales. I. — Guy West 

 AYilson* confines his first paper to a consideration of the genus Albugo, 

 special attention being paid to the oospores. On the basis of oospore 

 characters, he divides the genus into two groups : the first of these 

 includes all forms in which the oospores are tuberculate or ridged ; in 

 the second group they are reticulated. There are two species in which 

 the oospores are unknown, but it is supposed that they would fall into 

 the second group. Wilson describes liJ species, one of which, A., occi- 

 dentalis, found on Chenopodiacefe, is new to science. 



Dicranophora fulva.f — P. Vuillemin describes fully this fungus 

 which grew on Gomphidius viscidius. It has been recorded also on 

 PaxiUus involutiis signifying, Vuillemin considers, an affinity between 

 that fungus and Gomphidius. Dicranophora produces zygospores as 

 well as sporocysts on the same mycelium. The zygospores are very 

 large, up to 200 jx in diameter and black in colour. The other forms of 

 fructification are also carefully described, and illustrated by figures in 

 the text. Dicranophora seems to be intermediate between Sporodinia 

 and Spinellus. 



Three Interesting Ascomycetes.J — W. B. Grove found a specimen 

 of Dasyscypha camscens studded with a conidial form which he has 

 named AcrotJieca canescens. The conidiophores were brown, and bore, 

 at the tips, a number of fusiform conidia. He records also observations 

 made on the spores of Goryne urnalis. In the same individual, asci 

 were found with eight spores, and others with four spores, along with a 

 number of smaller spores ; in addition, some of the cups produced not 

 asci, but hyphae, bearing huge numbers of minute allantoid conidia. A 



* Bull. Torrey Bot. Club, xxxiv. (1907) pp. 61-84 (10 figs.), 

 t Ann. MycoL, v, (1907) pp. 33-40 (8 figs.). 

 X Journ. Bot., xlv. (1907) pp. 169-72 (1 pi.). 



